Here's something, sword logic requires you to kill in return it gives you strength (same concept for guardians), but if you died and kept coming back, would you really need sword logic. If you knew you could die, and basically never really have to die (like resurrection), would you still pursue power or just know given an infinite amount of time eventually you could over come a foe...what if both foes were able to live forever, and both had a form of sword logic?